[PATCH] __read_page_state(): pass unsigned long instead of unsigned
By making the offset argument of __read_page_state an unsigned long instead of unsigned, we can avoid forcing the compiler to sign extend a usually constant argument. This saves 1 instruction on x86-64. Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -135,7 +135,7 @@ struct page_state {
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extern void get_page_state(struct page_state *ret);
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extern void get_full_page_state(struct page_state *ret);
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extern unsigned long __read_page_state(unsigned offset);
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extern unsigned long __read_page_state(unsigned long offset);
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extern void __mod_page_state(unsigned long offset, unsigned long delta);
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#define read_page_state(member) \
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@ -1144,7 +1144,7 @@ void get_full_page_state(struct page_state *ret)
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__get_page_state(ret, sizeof(*ret) / sizeof(unsigned long));
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}
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unsigned long __read_page_state(unsigned offset)
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unsigned long __read_page_state(unsigned long offset)
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{
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unsigned long ret = 0;
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int cpu;
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